Method for preparing profile control agent and blocking water agent by employing oilfield waste polymers

A technology of profile control and water shutoff agent and polymer, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of secondary dust pollution, complicated sludge treatment, limited amount of sludge additives, etc.

Inactive Publication Date: 2008-06-25
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

In this patent, the treatment of sludge is relatively complicated and easily causes secon

Method used

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Examples

Experimental program
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Effect test

example 1

[0013] Example 1: Add 55 g of 20% sodium acrylate aqueous solution to 45 g of 30% acrylamide and stir evenly, add 50 g of 50% oil field waste polymer, add 0.025 g of initiator potassium persulfate and 0.013 g of sodium bisulfite after filling with nitrogen to remove oxygen , 0.05 g of aluminum citrate as a cross-linking agent, stirred and heated at 45°C under normal pressure for 8 hours to polymerize into a rubber sheet, crushed, dried, and pulverized to obtain the product. Product absorption weight concentration 0.9%NaCl saline multiple: 560g / g;

example 2

[0014] Example 2: Add 25 g of 10% sodium acrylate aqueous solution to 60 g of 15% acrylamide and stir evenly, add 75 g of 25% waste polymer gel, fill with nitrogen to remove oxygen, and then add 0.052 g of initiator ammonium persulfate and 0.026 g of sodium sulfite to crosslink Agent N, N-methylenebisacrylamide 0.1g was stirred and heated to 55°C under normal pressure for 8 hours to polymerize into a rubber sheet, then crushed, dried, and pulverized to obtain the product. Product absorption concentration of 0.9% NaCl saline multiple: 830g / g;

example 3

[0015] Example 3: Add 35 g of 15% sodium acrylate aqueous solution to 35 g of 20% acrylamide and stir evenly, add 80 g of 5% waste polymer gel, add 0.066 g of initiator potassium persulfate and 0.037 g of sodium bisulfite after filling with nitrogen to remove oxygen g, 0.067 g of cross-linking agent aluminum citrate was stirred and heated at 60°C under normal pressure for 8 hours to polymerize into a rubber sheet, then crushed, dried, and pulverized to obtain the product. The product has an absorption weight concentration of 0.9% NaCl saline times 1050g / g;

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Abstract

The invention relates to a method for utilizing waste polymers in the oilfield to prepare a profile control and water plugging agent. The acrylamide and the sodium acrylate monomers are added into the waste polymer gel produced in the oilfield development to carry out the copolymerization and crosslinking so as to synthesize a bulk expansive profile adjusting agent for oilfield which is used for adjusting the large pore reservoir deep profile in the oilfield development. The obtained profile control and water plugging agent for oilfield is applied in the high water bearing region and is a bulk expansive profile adjusting agent for oilfield.

Description

technical field [0001] The invention relates to a method for preparing a profile control and water shutoff agent by utilizing waste polymers in oil fields, and belongs to the technical field of polymer material preparation. Background technique [0002] Oilfield waste gel is a waste polymer gel produced after treatment in oilfield production. The main component of the gel is slightly cross-linked or partially cross-linked polyacrylamide gel. Containing a certain amount of crude oil, metal ions and some minerals, it is generally disposed of through landfill and other methods, which not only pollutes the environment greatly, but also wastes resources. How to make waste harmless and comprehensively utilize resources, not only protect the environment, but also increase the reuse of waste, has attracted more and more attention. [0003] Chinese patent CN1781860 "A Synthetic Method for Preparing Body-Swelling Granular Profile Control Agent Using Oil Production Sludge" prepares a ...

Claims

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Application Information

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IPC IPC(8): C08F291/00C09K8/42
Inventor 张文德王丕新徐昆宋春雷谭颖
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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